vulnerability
Red Hat: CVE-2023-4194: kernel: tap: tap_open(): correctly initialize socket uid next fix of i_uid to current_fsuid (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:C/A:N) | Aug 7, 2023 | Nov 8, 2023 | Aug 11, 2025 |
Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:C/A:N)
Published
Aug 7, 2023
Added
Nov 8, 2023
Modified
Aug 11, 2025
Description
A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to bypass network filters and gain unauthorized access to some resources. The original patches fixing CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits - a096ccca6e50 ("tun: tun_chr_open(): correctly initialize socket uid"), - 66b2c338adce ("tap: tap_open(): correctly initialize socket uid"), pass "inode->i_uid" to sock_init_data_uid() as the last parameter and that turns out to not be accurate.
Solutions
no-fix-redhat-rpm-packageredhat-upgrade-kernelredhat-upgrade-kernel-rt
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